Corrosion Protection of Tools

Corrosion Protection of Tools


Suhner India Pvt Ltd offers Corrosion Protection of Tools for applications in wet and dusty environment. Water, steam, dust is a challenging mix. The use of water as cutting fluid is imperative for machining stone, ceramics, concrete or for water jet cutting. Here, water becomes the biggest challenge for machines and their designers. Depending on the pH value, even clean water can have a corrosive effect. Water mixed with dust becomes an abrasive. Water steam invades surfaces. During the last years, SOMEX has realised various customer projects where the working environment demanded an increased corrosion resistance of the components. If water is used as cutting fluid without adding lubricants, emulsions or corrosion protection, the choice of material and the selected surface machining have to be adapted to the water composition depending on the project. Moreover, depending on the field of application, electrical and mechanical components require special protection. The best solution is to remove these components completely from the hazard area with structural measures. For a recently completed project for concrete machining, we added a cylindrical housing to the MAX40R milling spindle already in use; in addition, the automatic tool change system was upgraded for heavy-duty work in mud and dirt. While machining the concrete elements, the untreated ground water was immediately mixed with the concrete dust and this became a heavily abrasive and corrosive mass. For example, the functional specification required the operating personnel to clean using a high-pressure cleaner after every stop. The challenge was: the unit had to be both water and dust-resistant as well as corrosion-resistant. To increase the density, SOMEX made the spindle pressure-resistant, increased the amount of seals in the transfer area, used sealed bearings, created inner labyrinth apertures and an asynchronous motor with splash-proof coils. To increase the corrosion resistance of this product, parts that are directly exposed to water are made of stainless steel or their surfaces undergo a special treatment, which also improves the wear resistance, the corrosion protection and the fatigue resistance. Finally, external protection was ensured by using a special varnish. Those experiences gave the company an opportunity to acquire some special knowledge which is now employed to the benefit of OEM customers when there are problems caused by aggressive applications that need to be solved. SOMEX had implemented further applications of graphite blanks, and materials of equal complexity, and subjected them to high temperatures. SOMEX has true expertise in implementing customer requirements according to project specifications.

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